i never did Butts or abt at that temp. rainy days are tough to get things hot enough. I miss my Funkotorium which covered my Meat Mama 3000.
What is your equipment. With some set ups you can actually just keep the pit closed until you HEAR it. Like listening to popcorn in the microwave, you would shut it down when you hear the most dripping and sizzling.
In your particular case, heres a great song recorded before his tummy blew up in that tour bus years ago.